\def\ltj@unhbox@curfield{\ltjfakeboxbdd\unhbox\@curfield\ltjfakeboxbdd}
%\patchcmd\@contfield{\unhbox\@curfield}{\ltj@unhbox@curfield}{}{}
\patchcmd\@addfield{\unhbox\@curfield}{\ltj@unhbox@curfield}{}{}
\def\ltj@unhbox@curfield{\ltjfakeboxbdd\unhbox\@curfield\ltjfakeboxbdd}
%\patchcmd\@contfield{\unhbox\@curfield}{\ltj@unhbox@curfield}{}{}
\patchcmd\@addfield{\unhbox\@curfield}{\ltj@unhbox@curfield}{}{}